Methods To Create Concrete Stairs?
Construction of concrete stairs includes steps such as designing, preparing foundation, building formwork, keeping of reinforcement steel bars, concreting, finishing and curing. Construction of concrete stairs is often a difficult job that will need an engineer to examine all the aspects and design it and a skilled labour to develop it.
Steps for Construction of Concrete Stairs
The followings are the steps involved in construction of concrete stairs,
1. Designing of Concrete Stairs
Designing of stairs requires through knowledge about design aspects and site study. The standards that influence the design of stairs are height in the floor, width from the stairs, risers depth, thread width, thickness from the stairs, angle of the stairs, load placed onto the stairs and a lot of other aspects which takes a qualified engineer to create the right stairs.
2. Foundation and Support for Concrete Stairs
The muse on which the concrete stairs rest will be properly constructed so that the loads of the stairs are transferred in to ground successfully and also to resist the movement of stairs.
If your plinth beam of building is present at the outset of the stairs, then the reinforcement steels bars could be associated with them that may transfer the loads. If no plinth beam is found, then this small concrete foundation or size stone masonry is made.
To aid the steps at the top which restricts the movement of stairs is normally completed to the rooftop beam or slab.
3. Building the Form-work for Concrete Stairs
The most important step when building concrete stairs is to apply an appropriate formwork. The angle of flight, measurements of thread and riser are to be properly checked. Usually while constructing a stairs mounted on wall, the fishing line of flight , thread and risers are marked on the wall for proper fixing of shuttering or formwork.
The boards should be no less than 2” thick, about keep the weight from the concrete. The complete structure in the form, should be backed up by 4?4 posts. The wooden boards are used to build the steps and are fastened with several screws for the lateral structure in the formwork.
Utilize a spirit level, concerning guarantee the form is level and plumb, if you wish to obtain a neat look. The type of the concrete stairs needs to be linked to the ceiling.
These steel reinforcement bars are placed in the formwork with a minimum of 25 mm spacing which is tied together.
5. Pouring of Concrete for Concrete Stairs
Pouring of concrete in to the formworks commences from your below part to above. The concrete mix plays a vital role in durability and strength of stairs. Standard mix used for stairs are 3 parts cement, 2 parts sand, 4 parts gravel and water.
It is recommended to utilize a concrete vibrator while pouring the concrete to fully fill the gaps from the stairs and to prevent the honeycomb formation.
4. Steel Reinforcement for Concrete Stairs
The concrete steps have to be reinforced with steel bars so as it carries the loads coming upon the stairs and transfer these phones the ground. The number of steel bars and sized the bars will be calculated by the structural engineers based upon the hundreds beginning the steps.
These steel reinforcement bars are placed from the formwork with at least 25 mm spacing and is also tied together.
5. Pouring of Concrete for Concrete Stairs
Pouring of concrete in the formworks commences through the below part to above. The concrete mix plays a vital role in strength and durability of stairs. Standard mix used for stairs are 3 parts cement, 2 parts sand, 4 parts gravel and water.
It is recommended utilize a concrete vibrator while pouring the concrete absolutely fill the gaps with the stairs also to prevent the honeycomb formation.
The job is to be carried out with great care and patience , every sudden movements can disturb the alignment in the formworks as well as collapse the formwork. It is always recommended to pour the concrete ceiling and stairs from the same day, as to build a strong bond between these factors.
6. Removal of Formwork
The steps requires at least A 3 week period to dry up completely, so the removal of formwork is always to done once 21days. During these 21 days proper curing is usually to implemented to prevents the cracks in stairs because of thermal expansion.
As soon as the A three week period, the formwork is taken off using a hammer as well as a crowbar. Assist patience, concerning avoid damaging the concrete or even the edges with the stairs.
7. Finishing of Concrete Stairs
When the formwork is taken off, the stairs might be finished in many ways as reported by the feature the employment. It could try to be finished using trowel or float to present concrete finish, cement tiles, granite might be installed for much better appearance. Even carpet or wood could also be used in order to complete the stairs.
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